Zero-day vulnerability in Sophos Firewall

Input validation error
CVE-2022-1040

Sophos has observed this vulnerability being used to target a small set of specific organizations primarily in the South Asia region.

Vulnerability details

Advisory: SB2022032801 - Remote code execution in Sophos Firewall

Vulnerable component: Sophos Firewall

CVE-ID: CVE-2022-1040

CVSSv3 score: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C

CWE-ID: CWE-20 - Improper input validation

Description:

The vulnerability allows a remote attacker to compromise the affected device.

The vulnerability exists due to insufficient validation of user-supplied input in the User Portal and Webadmin. A remote attacker can send specially crafted requests to the web interface and execute arbitrary code on the system.

Successful exploitation of the vulnerability may allow an attacker to compromise the affected device.

Note, the vulnerability is being actively exploited in the wild.

Public Exploits:

- Sophos XG115w Firewall 17.0.10 MR-10 - Authentication Bypass [Exploit-DB]

External links:

https://www.sophos.com/en-us/security-advisories/sophos-sa-20220325-sfos-rce

About zero-day vulnerabilities

Zero-day vulnerability is an undisclosed vulnerability in software that hackers can exploit to compromise computer programs, gain unauthorized access to sensitive data, penetrate networks, etc. We consider vulnerability a zero-day when there is no solution provided from software vendor and the vulnerability is being actively exploited by malicious actors.

Zero-day candidate is a potential zero-day vulnerability in software which might have been used in targeted attacks, however there is no evidence to support this suggestion.